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(No Mode l.) 3Sheets -Sheet 1.

- E. VICTORY. I PULP SCREENING MACHINE.

Elm-417,451. Patented Dec. 17, 1889.

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3 Sheets-Sheet a] E. VICTORY, PULP S'GRBBNING MACHINE.

No. 417,451. Patented Dec. 17, 1889 WIT/VESQES:

A T TOR/YE Y I N. PETERS. F'hulo-Lvlhugmphcr, Wnshluglml. 11.0v

5 UNITED STATES PATENT OFF CE.

EDMUND VICTORY, OF \VATERTOWVN, NEV YORK, ASSIGNOR OF ONEHALF TO CHARLESREMINGTON, OF SAME PLACE.

PULP-SCREENING MACHINE.

SPECIFICATION forming part or Letters Patent No. 417,451, dated December17, 1889. Application filed April 19, 1889. Serialllio. 307,895. (Nomodel.)

chines, 'of which the following is a specificafl tion.

My invention consists in a new and im-: proved pulp-screening machine,which will be hereinafter fully described and claimed.

Referring to the accompanying drawings,

Figure 1 is a perspective view of my new and improved pulp-screeningmachine, showing the hinged top opened. Fig. 2 is a longitudinalvertical central sectional view ofthe machine. Fig. 3 is a transversevertical sectional view taken on the plane indicated by line 00 0c ofFig. 2; and Fig. 4 is a detail view, hereinafter referred to.

The same numerals of reference indicate corresponding parts in all thefigures.

Referring to the several parts by their designating numerals, 1indicates the supporting-frame of the machine, and 2 indicates therectangular body-frame, which has the series of parallel cross-bars 3,forming the rectangular spaces 4. At the top of the spaces 4 are securedthe separate bellows-plates 5, the sides of which are connected to thecross-bars 3, while their ends are connected to the side pieces of theframe 2 by the flexible bellowsjoints 6, of suitable material.

In the lower part of the frame 1 is mounted a longitudinal drive-shaft-7, which is revolved in any suitable manner, and upon this shaft, belowthe center of the bellows-plates, are

mounted a series of eccentrics 8 9, which are connected to the middleunder side of the bellows-plates by the frames 10. These eccentrics arearranged alternately, so that as the alternate eccentrics S elevate thealternate bellows-plates to which they are connected the other alternateeccentrics 9 will lower the alternate bellows-plates to which they areconnected.

The outer edges of the flexible bellowsjoints 6 are secured under metalstrips 11 12. Atthe outer edge of the strips 11, which run around thetop of frame 2, is secured a packing 13, of rubber or other suitablematerial, while the metal strips 12 extend along the 1 center of the topof the cross-bars 3, and

along. both their edges are secured packingstrips 14:, of rubber orother suitable material.

15 indicates the top of the machine, which is hinged at one side, thescrews at the lower leaf of each hinge passing through short slots inthe hinge-leaf, or the top can be otherwise loosely hinged. The top hascross-bars 17,

which register with the cross-bars 3 of the body-frame 2,and thescreen-plates 18' are secured on the top, as shown, with their sideedges meeting on the cross-bars 17. The top 15 and body 2 have oppositeapertured lugs l9,through which screw-bolts 20 pass,having nuts on theirends, and it will be seen that by tightening these screw-bolts the topwill be locked tightly down, the top and its crossbars pressing downfirmly on the packing13 and 14 around the ends and sides of the bellows-plates 5, thus separating each bellows plate by an air-tight jointextending entirely around it and rendering each bellows and thescreen-plate above it entirely independent from all the others. This isan important feature of my invention.

The top of each bellows-plate is concave, and each bellows is formedwith a central opening 21, from which a short pipe 22 leads down into abox 23, which is secured longitudinally beneath the center of thecrossbars 3. The lower ends of these pipes 22 terminate at about thedistance above the bottom of the box shown, and they are always sealedby the water and paper stuff in the boX, above which they never rise.

In operation it will be seen that as the drive-shaft 7 revolves thebellows-plates, each having its separate eccentric, will be moved up anddown alternately, as before described, the bellows-joints 6 permittingthis movement, and, as the packing completely around each bellowsseparates it completely from the others when the top 15 is fastened downby the screw-bolts, it will be seen that each bellows will operateindependently of all the others and draw the paper-pulp which flows uponthe screen-plate above it down through the screen plate. The paper pulpis thus in g bellows, and passes down through the central openings 21and pipes 22 into the longitudinal box 23, from which it may bedischarged through pipes 24, or in any other suitable manner.

I do not wish to confine myself to the discharge-pipes here shown, as Imay employ any other well-known means for effecting the same purpose.

It Will be seen that by arranging the eccentric so that the bellows riseand fall alternately the machine will be steadied and will run evenly.

In order to brace and strengthen the comparatively-thin cross-bars 17 ofthe top, I employ brace-bolts 25, two to each bar, as shown, which passup through the cross-bars 3 of the body 2 and through the bars 17, andhave nuts 26 upon their upper threaded ends, which fit in recesses inthe bars 17,flush with the top of the same. hen the top is closed andscrewed down, the screw-bolts 25 are screwed up tight in the nuts 26,andwill thus strengthen and brace the cross-bars 17 and prevent springingof the screen-plates.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

1. In a pulp-screening machine, the combination of the series ofseparate screens 18, the series of independent bellows-plates 5, havingthe flexible bellows-joints 6 at their sides and ends, the drive-shaft7, having the eccentrics 8 9 alternately arranged upon it, and theconnecting-frames 10, substantially as set forth.

2. The combination, in a pulp-screening machine, of the body-frame 2,having the parallel cross-bars 3, the series of independentreciprocating bellows-plates 5, having the flexible bellows-joints 6 atthcirsides and ends, the flexible packing-strips 13 and 14, extendingaround the ends and sides of each bellows, and the top 15, having theseries of parallel cross-bars 17 and the screen-plates 18, substantiallyas set forth.

3. The combination of the body-frame having the cross-bars, thereciprocating bellowsplates having the bellows-joints and formed withthe concave upper faces and central discharge-openings, the packingaround each bellows, and the top having the cross-bars and thescreen-plates, substantially as set forth.

4. The combination of the body-frame havin g the cross-bars, thereciprocating bellowsplates having the bellows-joints, the concave upperfaces, the central discharge-openings, and the pipes leading down fromsaid openings, the packing around said bellows, the top having thecross-bars and the screen-plates, and the longitudinal box having thedischarge, substantially as set forth.

5. The combination of the body-framehaving the cross-bars, thereciprocating bellowsplates having the bellows-joints, the concave upperfaces, the central openings and the pipes leading from said openings,the driveshaft having the series of eccentrics alternately arranged uponit, the connectingframes, the packing around each bellows, the tophaving the cross-bars and screen-plates, and the longitudinal box havingthe (lischarge, substantially as set forth.

6. The combination, with the body having the cross-bars formed with theapertures between the bellows, and the top having the aperturedcross-bars which support the screen edges, of the brace-bolts having thenuts on their upper ends, substantially as set forth.

EDMUND VICTORY. lVitn esses:

SoLoN O. KEMON, CHAS. A. PETTIT.

